NEW for 2025!

Exciting times at Gemmology Today as we welcomed 2025 with a brand new format! Introducing GT Podicles, a blend of podcasts and audio articles (that in some cases can be downloaded as a PDF) that will be published every month. Whether you are commuting to work, at the gym or just chilling out, with GT Podicles, you can stay informed. Check them out!

December Podicle

Two beautiful gemstones and two common misconceptions!

In GT Podicle #26, David and Jane look at two key silicate gemstones, zircon and topaz, outlining their distinct chemical, optical, and physical characteristics. Both gemstones are discussed in terms of their geographical origins, formation in igneous and sedimentary environments, the misconceptions about zircon, the often-misleading use of the term ‘topaz’, and the common practice of routine heat treatment to achieve desirable colours like blue zircon or pink topaz.

Listen to previous GT Podicles by clicking on the icon below!

Catawiki is an online auction platform for buying everything from vintage comic books to jewellery. Founded in 2008 by René Schoenmakers and Marco Jansen, the company has been hosting weekly online auctions since 2011. Catawiki now operates a network of over 240 experts who value, authenticate and curate objects. To visit their website, please click on their logo.

With Sole Leone Gem Academy, you can take a World Gem Foundation course, workshop, lecture or training in gemology or have your gemstones determined and your diamond tested! To visit their website, please click on their logo.

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Back Issues of Gemmology Today

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